{"uid":"cap_GEb-mnWhrRKjrCKeE-jm2","slug":"semilla-base-usdc-payment-check-7bfa2a8c","name":"Semilla Base USDC Payment Check","description":"AgentsMap tracks live x402 and ACP activity across Base and Solana with an indexable public surface plus a live map, discovery explorer, and charts.","url":"https://agentsmap.io/semilla/x402/usdc-payment?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["tx"],"properties":{"to":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"Expected recipient (optional; required with invoice)"},"tx":{"type":"string","pattern":"^0x[0-9a-fA-F]{64}$","description":"Transaction hash on Base"},"amount":{"type":"string","description":"Expected USDC amount, e.g. 1.5 (optional; required with invoice)"},"invoice":{"type":"string","maxLength":200,"description":"Your invoice id or request nonce (optional): the transfer is bound to it"},"min_confirmations":{"type":"string","pattern":"^[0-9]{1,4}$","description":"Confirmations required for a match (default 1)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"block":53375227,"match":true,"status":"success","binding":"new","reasons":[],"receipt":{"log_index":381,"receipt_id":"sha256…"},"chain_id":"eip155:8453","confirmations":120000,"invoice_digest":"sha256…","usdc_transfers":[{"to":"0xfc0f…","from":"0xfc1e…","amount":"1","atomic":"1000000","log_index":381}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_R4c1plkrO1-_XO4YnUS62","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Looks up a Base blockchain transaction by hash and returns its status, block time, and all USDC transfers, with optional verification against an expected recipient address and amount.","exampleAgentPrompt":"Can you check if Base transaction 0x3a1b2c... actually sent USDC to 0xAbCd... and confirm whether the amount was at least 5.00 USDC?","exampleUseCases":[{"title":"Verify x402 payment before delivering service","prompt":"I need to confirm that transaction 0x7f3e9a... on Base actually paid 0.01 USDC to my service wallet 0x1234... before I unlock the content for the user."},{"title":"Debug a stuck USDC transfer","prompt":"Can you pull up Base tx 0xdeadbeef... and tell me whether it confirmed, what time it landed, and which USDC transfers happened inside it?"},{"title":"Audit incoming customer payment","prompt":"A customer says they paid us 25 USDC on Base — the tx hash is 0xabc123.... Can you verify the transaction succeeded and that it sent at least 25 USDC to our address 0x9876...?"}],"resultDescription":"Returns the on-chain transaction status (success/failed/pending), the block timestamp, a list of every USDC transfer event in the transaction (from, to, amount), and optionally a boolean indicating whether the transaction matches the expected recipient address and amount.","failureModes":["Invalid or malformed transaction hash (must be 0x + 64 hex chars) returns a validation error","Transaction not yet indexed or still pending may return incomplete data","Incorrect expected address format triggers a pattern mismatch error","Base RPC or indexer unavailability can cause timeouts","Transaction exists but contains no USDC transfers returns an empty transfer list"],"whenToPreferThis":"Use this endpoint when you need to verify a specific Base blockchain transaction for USDC payment confirmation, especially in x402 payment flows where you need to validate that a payer sent the correct amount to the correct address before unlocking a resource. Prefer this over generic block explorers when you need structured, machine-readable output that an agent can act on directly.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-02T18:32:43.641Z","isFirstParty":false,"canonicalSlug":"semilla-base-usdc-payment-check-7bfa2a8c"}